Submerged feathering-propeller.



' Nu. 630,499. Patented Aug. a, |999.

' E IF. GORMAN a. P. F. YosT.

SUBMEBGED FEATHERING PBOPELLEB.

(Application led Oct. 19, 1898.) (No Modell') UNITED STATES PATENT OFFICE.

EDVARD F. GORMAN AND PENFILD F. YOS'l, OF PHILADELPHIA,

' PENNSYLVANIA. I

SUBM ERG ED FEATHERlNG-PROPELLER.

SPECIFICATION forming part of Letters Patent No. 630,499, dated August 8, 1899. Application filed October 19, 1398. Serial No. 694,020. (No model.)

To all whom it may concern.-

Be it known that we, EDWARD F. GORMAN and PENFIELD F. YosT, citizens of the United States, residing at Philadelphia, county of Philadelphia,and State of Pennsylvaniadiave invented a certain new and useful Improvement in Submerged Feathering-Propellers for Marine Purposes, of which the following is a specification.

Our invention relates to a new and useful improvement in submerged feathering-propellers for marine purposes,and has for its object to providea simple and effective propel- 1er of this description the blades of whichv will exert the maximum force against the water in the proper direction and then be turned edgewise through one portion of their movement which would retard the vessel.

A further object of our invention is to overcome the side thrust incident to the screwpropeller and avoid the possibility of churn- Figure 1 is a section of the hub, showing theV blade-spindles and the spherical cam for operating the same; Fig. 2, a longitudinal section of the power-shaft and hub, also showing the spherical cam and the grooves therein for operating the blade-spindles; Fig. 3, a diagrammatical View of the cam-grooves, and Fig. 4 a detail perspective of one of the blade-spindles.

In carrying out our invention as here embodied, A represents a hub formed or securedv upon the hollow1 shaft, B, and this hub and shaft are made in two sections secured together in any convenient manner. A spindle C is fitted within the hub and shaft so as to remain stationary while the shaft and hub revolve and has secured thereon a spherical cam blades, for the purpose hereinaftersetoth.

D. This cam D has'two grooves E and E Aformed therein, and these grooves are deflected, asindicated at F and F', as clearly shown in Fig. 3.-

Spindles G, here shown as four in number, are fitted within the hubso as to oscillate therein, each having two pins Hand Il projecting therefrom into the grooves E and E,

respectively. The result of this is that when the hub is revolved, carrying the blade-spindles G, the pins of said spindles, traveling in the straight portions of the groovesE and E',

'will hold the spindles, and consequently the blades, in the position which corresponds to the particular portion of the grooves in which `the pins are then traveling; but when the pins are brought into engagement with the deilected portions Fand Fof the grooves the spiny dles G will then be caused to oscillate through ninety degrees, carrying with them Atheir Theformation of the deiiections in the grooves E and E is such that the defiection F, coming in contact with the pin H, will act to turn' its spindle, while the pin H will revolve without being acted upon by the deflection F', which is enlarged, solas to not act travel of the pins they reach the second set of deflections F2 and F3 the deiection F2 acts upon the pin H to again turn the spindle to the first position,duriug which movement the pin H will move in the deiection F3 without From this description it will be seen that the revolving of the hollow propeller-shaft B 'will cause the propeller-blades I, carried by the spindles G, not only to revolve with the hub, but also to alternately turn to bring their surfaces against the water and to again turn edgewise thereto, and this turning movement should be so timed by the proper location of the spherical cam D as to first cause the propeller-blades to fully act upon the water 95 to force the vessel forward and then edgewise to feather during the remainder of their movement until reaching the proper point, when they will again be turned and take a full4 hold upon the water, as will be readily understood. The reversing of the movement of the propeller-shaft will produce a reverse of the pro- Vupon this last-named pin but when in the IOO peller-blades, thereby driving theyessel back- 2 In combination, a suitable hub, fa spherward. icalrarm fttejd therein, meansfor holding said 3o It is to be noted that the blade-spindles G cam stationary While the hub revolves, spinare concaved upon their inner ends, as indidles G tted to oscillate Within the hub, two

5 Gated at J, so as to be adapted to the contour pins arranged side by side, near the outer of this spherical cam, and thereby always re-f4 edge of and projecting from each of the lastmain in close proximity thereto. i named spindles `into the grooves of the cam, 35

We do not wish to be limited to any particularmanner of journaling the propellershaft or the securement of the cam-spindle passing therethrough, as these may be accomplished in any suitable manner.y Y

A propeller constructedin accordance with our improvement when submerged Will have'l tend to force the Vessel in the proper direction with the least consumption Lof power for l thespeed obtained. f l Having thus fullydescribed our invention, t what We claim as new and useful isf- 1^.l A propellerconsisting of a suitable,h1ub, I spindles journaled therein, blades carried by g said spindles, .a cam fitted Within the hub, meansf or lholdin g said cam ,stationarydn ring l the revolving of the hub, and pins arranged .on one sideof and projecting from the bladei `fied. 1

little or no side thrust and will at all times spindles into the grooves of saidcam, as specii` and 'blades carried by the said spindles, as shown and described.

3. -In combination, a rotary hollow hub, a

spherical cam fitted therein means for holding said cam stationary during the revolving of 4o the hub,said cam having two grooves formed therein'wit'h deflections, oscillating spindles fitted Withinthe hub having their inner ends ooncaved, two pins arranged side by side, near the edge and projecting fromY each of 45 thesefspindles into the grooves of 'the nam, and'blades carried by these spindles., as specif ned.

Vitn esses MARY E. HAMER, SAMUEL STUART. 

